While we think Google Analytics is a great tool for getting a sense of things, we also believe a really good practice is to track sales is through the use of channel-specific coupon codes.

This is really popular in podcast advertising: on a podcast ad, the host will say something like, "To get started go to somewebsite.com/frontmatter", or something like that.

That way, the advertiser knows what channel a sale or signup came from.

In our own new newsletters, we generate unique coupon codes, so both we and the author can track sales from specific promotions through their book's coupons page, which can be found here: